Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1995-06-07
1997-03-11
Pascal, Robert
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315307, 315293, 315158, 355 69, 399 51, G05F 100
Patent
active
056104804
ABSTRACT:
A control apparatus for a copying machine or the like, has a halogen lamp for exposing an original, a detection circuit for monitoring a turn-on voltage of the lamp, a comparator for comparing the monitored turn-on voltage with a reference value, a microcomputer having an internal timer, and a memory for storing a phase control amount for a previous exposure operation. The light amount of the halogen lamp can be converged to a target value within a predetermined period of time and without adverse influence of turn ON/OFF operations of other loads such as a motor.
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Canon Kabushiki Kaisha
Pascal Robert
Philogene Haissa
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